Musar su Genesi 41:14

It is known, according to our sages of blessed memory that he worked in the house of Potiphar only one year, and that he sat in the prison house for twelve years, [for he was driven out of his father's house when he was seventeen years old and he stood before Pharaoh when he was thirty], and we find in Shemoth Rabbah 3 that he had to sit in the prison house for ten years for having spoken lashon hara about his ten brothers, and because he said to the chief butler (Bereshith 40:13): "For if you remember me … and you remember me," it was decreed upon him [that he sit there] another two years — but when the time was completed, he did not remain there an extra moment, as it is written (Ibid. 41:14): "And they 'hastened' him out of the pit," and not "And they took him out of the pit," for then he would have remained there a few superfluous moments.

The twelfth thing a man should remember is that the Holy One, Blessed be He, sees the thoughts of his heart. See how a man who goes to minister before the king adorns and beautifies himself, as it is written, "For you may not enter within the king's gate clothed with sackcloth" (Esther 4:2). And as we see in the story of Joseph, "Then Pharaoh sent and called Joseph, and they brought him hastily out of the dungeon. And he shaved himself, and changed his raiment, and came in unto Pharaoh" (Gen. 41:14). And behold and see that he who stands before the king always does not adorn himself (as lightly) as he who stands before the king for one moment. If this is so, then we who stand before the King of Kings forever — for He sees the thoughts of our hearts whether secret or revealed, and there is no escape from Him, for He is everywhere — should think always of His greatness and agree in our hearts to do His will and to adorn ourselves in our thoughts before Him.